Are there only Russian trolls? I only seem to see these mentioned by Ars (I think Saudis and Israelis may have been mentioned too but that's like a 100 to 1 rat

Are there only Russian trolls? I only seem to see these mentioned by Ars (I think Saudis and Israelis may have been mentioned too but that's like a 100 to 1 ratio at best). I am pretty sure Russians aren't the only ones smart enough to have taken advantage of this opportunity. I think it could be interesting to write an article about the global state of troll farms, to compare their tactics, I assume Chinese trolls are very real and operate in a different way for example. Bot farms working directly for a government are also distinct than those offering services to random companies.